<template>
  <div class="emoji">
    <ul class="emoji-controller">
      <li v-for="(pannel,index) in pannels" :key="index" @click="changeActive(index)"
        :class="{'active': index === activeIndex}">
        {{ pannel }}
      </li>
    </ul>
    <ul class="emoji-container">
      <li v-for="(emojiGroup, index) in emojis" style="padding: 0" :key="index" v-if="index === activeIndex">
        {{emojiGroup}}--{{index}}
        <a href="javascript:;" v-for="(emoji, index) in emojiGroup" :key="index" @click="selectItem(emoji)">
          <span class="emoji-item" :title="emoji" :class="'sprite-' + getPureName(emoji)"></span>
        </a>
      </li>
    </ul>
  </div>
</template>
<script>
  import data from '@/utils/emoji-data.js'
  export default {
    name: 'emoji',
    data() {
      return {
        emojiData: data,
        pannels: ['表情', '自然', '物品', '地点', '符号'],
        activeIndex: 0
      }
    },
    created() {},
    methods: {
      changeActive(index) {
        this.activeIndex = index
      },
      getPureName(name) {
        return name.replace(/:/g, '')
      },
      selectItem(emoji) {
        this.$emit('select', emoji)
      }
    },
    computed: {
      emojis() {
        return this.pannels.map(item => {
          return Object.keys(this.emojiData[item])
        })
      }
    }
  }

</script>

<style lang='scss' scoped>
  @import '@/styles/emoji-sprite.scss';

  .emoji {
    .emoji-controller {
      height: 36px;
      overflow: hidden;
      margin-bottom: 0;

      li {
        float: left;
        width: 76px;
        font-size: 12px;
        line-height: 36px;
        cursor: pointer;
        text-align: center;
        position: relative;

        &.active::after {
          content: '';
          width: 100%;
          height: 1px;
          background: #0689dd;
          left: 0;
          bottom: 4px;
          position: absolute;
        }
      }
    }

    .emoji-container {
      height: 175px;
      overflow-y: auto;
      overflow-x: hidden;
      position: relative;

      li {
        font-size: 0;
        padding: 5px;

        a {
          float: left;
          overflow: hidden;
          height: 35px;
          transition: all ease-out 0.2s;
          border-radius: 4px;

          &:hover {
            background-color: #d8d8d8;
            border-color: #d8d8d8;
          }

          span {
            width: 25px;
            height: 25px;
            display: inline-block;
            border: 1px solid transparent;
            cursor: pointer;
          }
        }
      }
    }
  }

</style>
